Digitizing Books with the Help of Millions of People around the World
May 9th, 2008 by
I came across this video podcast episode of PBS’s Wired Science with Luis von Ahn, the guy who came up with “Captcha“, those fuzzy looking words that you have to enter on websites sometimes as proof that you are human.
“Captcha” was developed to prevent automation (usually via scripting) of a process, such as the creation of a user account. “Captcha” images are not readable by computers. Also the deployment of OCR (optical character recognition) technologies to identify letters within images does not work. To prevent OCR technology to be effective is actually the reason why the images always look so funny and distorted. (more…)
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